Take-up reel



Sept. 8, 1925. 1,552,566

0. NORDEN TAKE -UP REEL Filed Feb. 18. 1924 r5 v I Patented Sept. 8, 1925. I UNITED STATES PATENT OFFICE.

OLIVER NORDEN, OF CHICAGO, ILLINOIS, ASSIGNOB TO THE W'Ml. MEYER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TAKE-U1? REEL.

Application filed February 18, 1924. Serial No. 693,434.

To all whom it may concern: and 8 are dished outwardly at 16 forming Be it known that I, OLIVER NoRDEN, a ofiset margins 17 which are preferably citizen of the United States, residing at spread slightly as shown. The dishing or Chicago, in the county of Cook and State turning out at 16 is blunt, preferably roundof Illinois, have invented a certain new and ed to ellminate sharp corners and reduce 60 useful Improvement in Take-Up Reels, of corona loss. 7 which the following is a full, clear, concise, The axle 6 has an enlargement 18 and is and exact description, reference being had reduced at 19 to receive an outer side memto the accompanying drawings, forming a her or shield 20 spaced from side member 8 part of this specification. by enlargement 18 and provided with a cen- 65 This invention relates to tension reels and tral opening which fits over the reduced end winding devices and more particularly to 19. Side member .20 which is formed of reels of the spring take-up type. sheet metal, preferably aluminum and which The invention pertains especially to takeis preferably of circular formation, is

up reels for use in high tension X-ray tube clamped between head 18 and washer 21 by 70 circuits and the like, and its objects are to a screw 22 threaded into one end of a tapped improve the electro-static characteristics of bore through the axle. Mounted upon the such devices, particularly to the end of miniopposite end of axle is a spacing member mizing corona losses and to provide 1m- 24 reduced at 25 to lit in the central openproved means for mounting the reel upon mg in a similar side member or shield 23, 75 any desired support, an improved mounting which is clamped between the shoulder on for mounting said mounting means on the the spacing member 24: and a washer 26 by reel and a generally improved and simplified a screw 27 threaded into tapped axle 6. reel construction that may be economically The outer. side members 20 and 23 are rod ced. dished at 30 to conform to side members 7 T o acquaint those skilled in the art with and 8 and the margins of said side members the manner of constructing and using the in 20 and 23 are turned in laterally at 32 and vention I will now describe in connection extend circumferentially about the reel with with the accompanying drawings a specific a space 35 between them annularly about the 30 embodiment of the invention. reel. The inner edges of the inturned mar- In the drawings: gins 32 terminate in blunt, preferably round- Figure 1 is a side elevational view of a ed beads 34 and the corners 33 are blunt, reel embodying the invention; preferably rounded as shown. The dishing Fig. 2 is a Vertical section on line 2-2 of at 30 is also blunt, preferably of double 35 Fig. 3; and rounded formation to eliminate sharp Fig. 3 is a vertical section on line 33 corners. of Fig, 1. The side members or shields 20 and 23 are The reel shown comprises an axle 6, side in circuit with the conductor on the reel and members 7 and 8 which are preferably of they eliminate the corona losses which,

40 relatively thin metal stock and of circular where high tension current is involved, formation, and a circular metallic ring 9 would otherwise occur at the sharp annular upon and from which and between side edges of side members 7 and 8. The round members 7 and 8 conductor 10 is wound and ing or blunt formation of corners 33 and unwound. Within ring 9 and between side the rounded or blunt formation of edges 34.-

45 members 7 and 8 is a fiat spiral spring 12 reduces the corona losses or potential attached at one end by a pin 13 to axle 6 gradient from the edges and corners of the and at its opposite end to one of a plurality outer side members or shields to a minimum. of screws 15 which extend through and bind The inturned margins 32 shield the inside members 7 and 8 together with ring 9 terior of the reel and support a mounting 50 between them. Side members 7 and 8 and post mounted in the annular opening 35 be- 1 ring 9 are rotatable as a unit about axle 6 tween the edges of the inturned margins 32.

and spring 12 is tensioned by the relative The mounting post comprises a threaded rotation in unwinding the conductor 10 and stem 36 which projects out through annular acts to tension the conductor and maintain opening 35 and has at its inner end a head it taut and to rewind it. Side members 7 37 which may be formed integral with the for electrical connection therewith.

.mountlng post parts being of conducting times and rewound by the spring stem or riveted, welded or otherwise secured thereto. Head or enlargement 37 is preferablycurved circumferentially of the reel to conform to theinner surfaces of inturned margins 32. At its base stem 36 may be en larged at 38 and the sides of enlargement 38 flattened to cooperate with and space the inner beaded edges 34. Stem 36 projects out through opening 35 and threaded upon its projecting end is a nut 39 which upon being drawnor threaded up into cooperation with the outer surfaces of inturned margins 32 binds the mounting post securely in place upon the lateral flanges of side members 20 and 23. A screw 40. threaded into the opposite end of nut 39 permits mounting the reel as desired either supported or suspended upon the X-ray table or other support.

In use high tension current is supplied to the reel as by connecting the conductor from a source of alternating currentto the mounting. post 36 which thereby performs the dual function of mounting the reel and providing The material and all in good electrical contact the current travels through the corona shields 20 and 23 to axle 6 with which the shields are also in good electrical contact and through the axle, inner reel frame and spring to the inner. end of conductor 10 which is electrically and mechanically connected with ring 9 as by soldering it in an opening in said ring as shown at 42. The

conductor shown is insulated, in which case the insulation is removed at the point of connection with ring 9. While the employment of an insulated conductor maintains the resistance of the conductor substantially constant in its various wound and unwound conditions as more fully explained in my pending application, beri'al No. 359,685 filed February 18, 1920, the conductor may be insulated or uninsulated in so far as the present invention is concerned.

The free end of the conductor extends out through the annular opening 35 and is connected as desired to the tube or other desired circuit. As the distance from the reel to the tube or other point of connection is increased, the conductor 10 unwinds from the reel and this tensions spring 12 so that as the tube or other point of connection is moved nearer the reel the slack in conductor 10 is automatically taken up by spring 12 and the conductor 'is maintained taut-at all upon being released. V

Shields and 23 perform the dual function "of forming a mounting for the post 36 and eliminating corona losses from the sharp edges of side members and 8 and the blunt corners 33 and blunt edges 34 minimize the corona discharge from the shields.

The. width of opening 35 being less than the distance between the outturned ends of side members 7 and 8 and centrally disposed relative thereto, said opening forms a guide for guiding the conductor from and back into proper position upon the reel. The particular point of connecting the supply circuit to the reel may be varied. For example, instead of making the connection to post 36 connection may be made directly to the axle under one of the shield mounting screws. It is also to be understood that'the invention is not limited to the details of the particular inner reel structure'shown and described. W

The sheet metal of the shields or side members 20 and 23 is relatively light, and lends itself admirablyto the formation of the lateral mounting flangesfor the mounting post and to the formation of the corona reducing beads 34: and blunt corners 33. The mounting flanges of these side members 20 and 23 are preferably turned in and extend annularly about the side members as described, but it is to be understood that they may be turned outwardly instead of inwardly to support the means for mounting the reel and they need not extend annularly about the entire periphery of the side members, but maybe in the form of marginal lugs turned laterally in either direction with the fold or corner about which they are turned, formed bluntly, preferably rounded and the edgesof the side members and the edges of said lugs formed bluntly .or terminating in blunt, preferably rounded,

beads to reduce corona losses.

I claim: 7

1. In combination, an axle, a reel rotatable thereon, an enlargement which serves as a spacer at one endo'fthe axle, a side member mounted adjacent the outer face of the enlargement, a spacing member .011 the other end 'of the axle, aside member mounted on the axle with said spacing member between ita-nd the reel, said side members having inturned margins terminating in blunt beads spaced apart and defining an annular opening about the reel andfthe corners between the sidesof said members and the inturned margins being rounded, a conductor attached to the reel and adapted to be wound upon and unwound from said reel and to extend through said annular opening, and a mounting post mounted in said opening, said post having an enlargement for cooperation with the interior of said inturned margins and a nut threadable upon said post into cooperation with the exterior of said margins.

2. In combination, an axle, a reel rota-table thereon, an enlargement which serves as a spacer atone end of the axle, "a side member mounted adjacent the outer face of the enlargement, a spacing member on the other end of the axle, a side member mounted on the axle with said spacing member between it and the reel, said side members having inturned margins terminating in blunt beads spaced apart and defining an annular opening about the reel and the corners between the sides of said members and the inturned margins being rounded, a conductor attached to the reel and adapted to be wound upon and unwound from said reel and to 10 In witness whereof, I hereunto subscribe my name this 14th day of February, 1924.

OLIVER NORDEN. 

